I remixed the model from Peter H as I needed a different way to hang it. I used just 2 Ø14x8 mm magnets press fitted.
Plus I created a version, with an open front, that use less support material.
Behind the holes there are just 0.8 mm ot thickness, enough to avoid reduction of the force of attraction.
You'll find an .stp file if you want make your own version.
Cheers
p.s. In the model you'll see 3 holes that I made cause originally I wanted to use 3 magnets, but at the end I used just 2. I'll leave it cause maybe someone has magnets with the same diameter but less thickness, so this means less force.
The author remixed this model.